Biggest pet peeves when it comes to dungeon runs?

[Nestama]

Not sure how I feel about pulling for a tank without asking, though.

As a tank, it's a huge non-issue. If a healer/DPS pulls for me, I just do a single AoE rotation and boom. Everything is on me and there's no problem (even better if they used Arm's Length. That Slow is a nice mitigation). My only Job in dungeons is to hold hate and cycle through CD's. "You pull, you tank" is a toxic MPK playstyle and shame on anyone who chooses to play this way.

I also want to add that if a player has done one level 50/60/70/80 dungeon, then they've done every single dungeon in the game. They can say they're new, but that only applies to boss fights. Trash mobs are never new.